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Dust Morphology Of Comet Hale-Bopp (C/1995 O1): I. Pre-Perihelion Coma Structures In
Authors:BOEHNHARDT  H  BIRKLE  K  FIEDLER  A  JORDA  L  THOMAS  N  PESCHKE  S  RAUER  H  SCHULZ  R  SCHWEHM  G  TOZZI  G  WEST  R
Institution:(1) Europeon Southern Observatory Chile, Alonso de Cordova, 3107, Santiago, Vitacura, Chile;(2) Max-Planck Institute for Astronomy, Heidelberg, Germany;(3) University Observatory, Munich, Germany;(4) Max-Planck Institute for Aeronomy, Katlenburg-Lindau, Germany;(5) Max-Planck Institute for Nuclear Physics, Heidelberg, Germany;(6) Institute of Planetary Exploration, DLR, Berlin, Germany;(7) European Space Agency, Noordwijk, The Netherlands;(8) Arcetri Observatory, Firenze, Italy;(9) European Southern Observatory, Garching, Germany
Abstract:In 1996 comet Hale-Bopp exhibited a porcupine-like coma with straight jets of dust emission from several active regions on the nucleus. The multi-jet coma geometry developed during the first half of 1996. While the jet orientation remained almost constant over months, the relative intensity of the jets changed with time. By using the embedded fan model of Sekanina and Boehnhardt (1997a) the jet pattern of comet Hale-Bopp in 1996 can be interpreted as boundaries of dust emission cones (fans) from four — possibly five — active regions on the nucleus (for a numerical modelling see part II of the paper by Sekanina and Boehnhardt, 1997b). This revised version was published online in July 2006 with corrections to the Cover Date.
Keywords:Hale-Bopp  dust coma  jets  fans
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